SRX Series: MACsec failure to report errors

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Summary

CVECVE-2017-2342
StatePUBLISHED
Assignerjuniper
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-07-17 13:18:24 UTC
Updated2025-04-20 01:37:25 UTC
DescriptionMACsec feature on Juniper Networks Junos OS 15.1X49 prior to 15.1X49-D100 on SRX300 series does not report errors when a secure link can not be established. It falls back to an unencrypted link. This can happen when MACsec is configured on ports that are not capable of MACsec or when a secure link can not be established. This can mislead customers into believing that a link is secure. On SRX 300 series devices, prior to 15.1X49-D100, MACsec was only supported on control and fabric ports of SRX340 and SRX345 devices. SRX300 and and SRX320 did not have any MACsec capable ports. Configuring MACsec on ports that were not MACsec capable would have resulted in this issue. Affected releases are Juniper Networks Junos OS 15.1X49 prior to 15.1X49-D100 on SRX300 series.

Risk And Classification

Primary CVSS: v3.0 8.1 HIGH from [email protected]

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Problem Types: CWE-392 | NVD-CWE-noinfo | CWE-392 CWE-392: Missing Report of Error Condition

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary8.1HIGHCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.0[email protected]Secondary8.1HIGHCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.0CNADECLARED8.1HIGHCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
2.0[email protected]Primary4.3AV:A/AC:M/Au:N/C:P/I:P/A:N

CVSS v3.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v2.0 Breakdown

Access Vector
Adjacent
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

AV:A/AC:M/Au:N/C:P/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Juniper Junos 15.1x49 d10 All All
Operating System Juniper Junos 15.1x49 d20 All All
Operating System Juniper Junos 15.1x49 d30 All All
Operating System Juniper Junos 15.1x49 d35 All All
Operating System Juniper Junos 15.1x49 d40 All All
Operating System Juniper Junos 15.1x49 d45 All All
Operating System Juniper Junos 15.1x49 d50 All All
Operating System Juniper Junos 15.1x49 d55 All All
Operating System Juniper Junos 15.1x49 d60 All All
Operating System Juniper Junos 15.1x49 d65 All All
Operating System Juniper Junos 15.1x49 d70 All All
Operating System Juniper Junos 15.1x49 d75 All All
Operating System Juniper Junos 15.1x49 d80 All All
Operating System Juniper Junos 15.1x49 d90 All All
Hardware Juniper Srx300 - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Juniper Networks Junos OS affected 15.1X49 prior to 15.1X49-D100 SRX300 series

References

ReferenceSourceLinkTags
2017-07 Security Bulletin: SRX Series: MACsec failure to report errors (CVE-2017-2342) - Juniper Networks af854a3a-2127-422b-91ae-364da2661108 kb.juniper.net Vendor Advisory
Juniper Junos SRX300 Series MACsec Non-Secure Fallback Lets Remote Users Obtain Potentially Sensitive Information on the Target System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Eric Haszlakiewicz and Thor Simon of Two Sigma Investments, LP (en)

Additional Advisory Data

Workarounds

CNA: There are no viable workarounds for this issue. It is good security practice to limit the exploitable attack surface of critical infrastructure networking equipment. Use access lists or firewall filters to limit access to the device from trusted, administrative networks or hosts.

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